diff --git a/core/Makefile b/core/Makefile
index f1e5947..38302a7 100644
--- a/core/Makefile
+++ b/core/Makefile
@@ -2330,64 +2330,54 @@
     $(ALL_GENERATED_SOURCES) \
     $(ALL_DEFAULT_INSTALLED_MODULES))
 
-# Note: TARGET_DEBUG_RAMDISK_OUT will be $(PRODUCT_OUT)/debug_ramdisk/first_stage_ramdisk,
-# if BOARD_USES_RECOVERY_AS_BOOT is true. Otherwise, it will be $(PRODUCT_OUT)/debug_ramdisk.
-# But the root dir of the ramdisk to build is always $(PRODUCT_OUT)/debug_ramdisk.
-my_debug_ramdisk_root_dir := $(PRODUCT_OUT)/debug_ramdisk
-
 INSTALLED_FILES_FILE_DEBUG_RAMDISK := $(PRODUCT_OUT)/installed-files-ramdisk-debug.txt
 INSTALLED_FILES_JSON_DEBUG_RAMDISK := $(INSTALLED_FILES_FILE_DEBUG_RAMDISK:.txt=.json)
 $(INSTALLED_FILES_FILE_DEBUG_RAMDISK): .KATI_IMPLICIT_OUTPUTS := $(INSTALLED_FILES_JSON_DEBUG_RAMDISK)
-$(INSTALLED_FILES_FILE_DEBUG_RAMDISK): DEBUG_RAMDISK_ROOT_DIR := $(my_debug_ramdisk_root_dir)
 
-# Cannot just depend on INTERNAL_DEBUG_RAMDISK_FILES like other INSTALLED_FILES_FILE_* rules.
-# Because ramdisk-debug.img will rsync from either ramdisk.img or ramdisk-recovery.img.
-# Need to depend on the built ramdisk-debug.img, to get a complete list of the installed files.
-$(INSTALLED_FILES_FILE_DEBUG_RAMDISK) : $(INSTALLED_DEBUG_RAMDISK_TARGET)
+# ramdisk-debug.img will merge the content from either ramdisk.img or
+# ramdisk-recovery.img, depending on whether BOARD_USES_RECOVERY_AS_BOOT
+# is set or not.
+ifeq ($(BOARD_USES_RECOVERY_AS_BOOT),true)
+  $(INSTALLED_FILES_FILE_DEBUG_RAMDISK): PRIVATE_ADDITIONAL_DIR := $(TARGET_RECOVERY_ROOT_OUT)
+  $(INSTALLED_FILES_FILE_DEBUG_RAMDISK): $(recovery_ramdisk)
+else
+  $(INSTALLED_FILES_FILE_DEBUG_RAMDISK): PRIVATE_ADDITIONAL_DIR := $(TARGET_RAMDISK_OUT)
+  $(INSTALLED_FILES_FILE_DEBUG_RAMDISK): $(INSTALLED_RAMDISK_TARGET)
+endif # BOARD_USES_RECOVERY_AS_BOOT
+
 $(INSTALLED_FILES_FILE_DEBUG_RAMDISK) : $(INTERNAL_DEBUG_RAMDISK_FILES) $(FILESLIST) $(FILESLIST_UTIL)
 	@echo Installed file list: $@
 	mkdir -p $(dir $@)
 	rm -f $@
-	$(FILESLIST) $(DEBUG_RAMDISK_ROOT_DIR) > $(@:.txt=.json)
+	$(FILESLIST) $(TARGET_DEBUG_RAMDISK_OUT) $(PRIVATE_ADDITIONAL_DIR) > $(@:.txt=.json)
 	$(FILESLIST_UTIL) -c $(@:.txt=.json) > $@
 
-# ramdisk-debug.img will rsync the content from either ramdisk.img or ramdisk-recovery.img,
-# depending on whether BOARD_USES_RECOVERY_AS_BOOT is set or not.
 ifeq ($(BOARD_USES_RECOVERY_AS_BOOT),true)
-my_debug_ramdisk_sync_dir := $(TARGET_RECOVERY_ROOT_OUT)
+  $(INSTALLED_DEBUG_RAMDISK_TARGET): PRIVATE_ADDITIONAL_DIR := $(TARGET_RECOVERY_ROOT_OUT)
+  $(INSTALLED_DEBUG_RAMDISK_TARGET): $(recovery_ramdisk)
 else
-my_debug_ramdisk_sync_dir := $(TARGET_RAMDISK_OUT)
+  $(INSTALLED_DEBUG_RAMDISK_TARGET): PRIVATE_ADDITIONAL_DIR := $(TARGET_RAMDISK_OUT)
+  $(INSTALLED_DEBUG_RAMDISK_TARGET): $(INSTALLED_RAMDISK_TARGET)
 endif # BOARD_USES_RECOVERY_AS_BOOT
 
-$(INSTALLED_DEBUG_RAMDISK_TARGET): DEBUG_RAMDISK_SYNC_DIR := $(my_debug_ramdisk_sync_dir)
-$(INSTALLED_DEBUG_RAMDISK_TARGET): DEBUG_RAMDISK_ROOT_DIR := $(my_debug_ramdisk_root_dir)
-
-ifeq ($(BOARD_USES_RECOVERY_AS_BOOT),true)
-# ramdisk-recovery.img isn't a make target, need to depend on boot.img if it's for recovery.
-$(INSTALLED_DEBUG_RAMDISK_TARGET): $(INSTALLED_BOOTIMAGE_TARGET)
-else
-# Depends on ramdisk.img, note that some target has ramdisk.img but no boot.img, e.g., emulator.
-$(INSTALLED_DEBUG_RAMDISK_TARGET): $(INSTALLED_RAMDISK_TARGET)
-endif # BOARD_USES_RECOVERY_AS_BOOT
+$(INSTALLED_DEBUG_RAMDISK_TARGET): $(INSTALLED_FILES_FILE_DEBUG_RAMDISK)
 $(INSTALLED_DEBUG_RAMDISK_TARGET): $(MKBOOTFS) $(INTERNAL_DEBUG_RAMDISK_FILES) | $(COMPRESSION_COMMAND_DEPS)
 	$(call pretty,"Target debug ramdisk: $@")
 	mkdir -p $(TARGET_DEBUG_RAMDISK_OUT)
 	touch $(TARGET_DEBUG_RAMDISK_OUT)/force_debuggable
-	rsync -a $(DEBUG_RAMDISK_SYNC_DIR)/ $(DEBUG_RAMDISK_ROOT_DIR)
-	$(MKBOOTFS) -d $(TARGET_OUT) $(DEBUG_RAMDISK_ROOT_DIR) | $(COMPRESSION_COMMAND) > $@
+	$(MKBOOTFS) -d $(TARGET_OUT) $(TARGET_DEBUG_RAMDISK_OUT) $(PRIVATE_ADDITIONAL_DIR) | $(COMPRESSION_COMMAND) > $@
 
 .PHONY: ramdisk_debug-nodeps
-ramdisk_debug-nodeps: DEBUG_RAMDISK_SYNC_DIR := $(my_debug_ramdisk_sync_dir)
-ramdisk_debug-nodeps: DEBUG_RAMDISK_ROOT_DIR := $(my_debug_ramdisk_root_dir)
+ifeq ($(BOARD_USES_RECOVERY_AS_BOOT),true)
+  ramdisk_debug-nodeps: PRIVATE_ADDITIONAL_DIR := $(TARGET_RECOVERY_ROOT_OUT)
+else
+  ramdisk_debug-nodeps: PRIVATE_ADDITIONAL_DIR := $(TARGET_RAMDISK_OUT)
+endif # BOARD_USES_RECOVERY_AS_BOOT
 ramdisk_debug-nodeps: $(MKBOOTFS) | $(COMPRESSION_COMMAND_DEPS)
 	echo "make $@: ignoring dependencies"
 	mkdir -p $(TARGET_DEBUG_RAMDISK_OUT)
 	touch $(TARGET_DEBUG_RAMDISK_OUT)/force_debuggable
-	rsync -a $(DEBUG_RAMDISK_SYNC_DIR)/ $(DEBUG_RAMDISK_ROOT_DIR)
-	$(MKBOOTFS) -d $(TARGET_OUT) $(DEBUG_RAMDISK_ROOT_DIR) | $(COMPRESSION_COMMAND) > $(INSTALLED_DEBUG_RAMDISK_TARGET)
-
-my_debug_ramdisk_sync_dir :=
-my_debug_ramdisk_root_dir :=
+	$(MKBOOTFS) -d $(TARGET_OUT) $(TARGET_DEBUG_RAMDISK_OUT) $(PRIVATE_ADDITIONAL_DIR) | $(COMPRESSION_COMMAND) > $(INSTALLED_DEBUG_RAMDISK_TARGET)
 
 endif # BUILDING_RAMDISK_IMAGE
 
@@ -2407,9 +2397,9 @@
 
 # Replace ramdisk.img in $(MKBOOTIMG) ARGS with ramdisk-debug.img to build boot-debug.img
 ifeq ($(BOARD_USES_RECOVERY_AS_BOOT),true)
-INTERNAL_DEBUG_BOOTIMAGE_ARGS := $(subst $(recovery_ramdisk),$(INSTALLED_DEBUG_RAMDISK_TARGET), $(INTERNAL_RECOVERYIMAGE_ARGS))
+  INTERNAL_DEBUG_BOOTIMAGE_ARGS := $(subst $(recovery_ramdisk),$(INSTALLED_DEBUG_RAMDISK_TARGET), $(INTERNAL_RECOVERYIMAGE_ARGS))
 else
-INTERNAL_DEBUG_BOOTIMAGE_ARGS := $(subst $(INSTALLED_RAMDISK_TARGET),$(INSTALLED_DEBUG_RAMDISK_TARGET), $(INTERNAL_BOOTIMAGE_ARGS))
+  INTERNAL_DEBUG_BOOTIMAGE_ARGS := $(subst $(INSTALLED_RAMDISK_TARGET),$(INSTALLED_DEBUG_RAMDISK_TARGET), $(INTERNAL_BOOTIMAGE_ARGS))
 endif
 
 # If boot.img is chained but boot-debug.img is not signed, libavb in bootloader
@@ -2460,9 +2450,24 @@
 # -----------------------------------------------------------------
 # vendor debug ramdisk
 # Combines vendor ramdisk files and debug ramdisk files to build the vendor debug ramdisk.
+#
+INTERNAL_VENDOR_DEBUG_RAMDISK_FILES := $(filter $(TARGET_VENDOR_DEBUG_RAMDISK_OUT)/%, \
+    $(ALL_GENERATED_SOURCES) \
+    $(ALL_DEFAULT_INSTALLED_MODULES))
+
+INSTALLED_FILES_FILE_VENDOR_DEBUG_RAMDISK := $(PRODUCT_OUT)/installed-files-vendor-ramdisk-debug.txt
+INSTALLED_FILES_JSON_VENDOR_DEBUG_RAMDISK := $(INSTALLED_FILES_FILE_VENDOR_DEBUG_RAMDISK:.txt=.json)
+$(INSTALLED_FILES_FILE_VENDOR_DEBUG_RAMDISK): .KATI_IMPLICIT_OUTPUTS := $(INSTALLED_FILES_JSON_VENDOR_DEBUG_RAMDISK)
+$(INSTALLED_FILES_FILE_VENDOR_DEBUG_RAMDISK): $(INTERNAL_VENDOR_RAMDISK_TARGET) $(INSTALLED_DEBUG_RAMDISK_TARGET)
+$(INSTALLED_FILES_FILE_VENDOR_DEBUG_RAMDISK): $(INTERNAL_VENDOR_DEBUG_RAMDISK_FILES) $(FILESLIST) $(FILESLIST_UTIL)
+	@echo Installed file list: $@
+	mkdir -p $(dir $@)
+	rm -f $@
+	mkdir -p $(TARGET_VENDOR_DEBUG_RAMDISK_OUT) # The dir might not be created if no modules are installed here.
+	$(FILESLIST) $(TARGET_VENDOR_RAMDISK_OUT) $(TARGET_DEBUG_RAMDISK_OUT) $(TARGET_VENDOR_DEBUG_RAMDISK_OUT) > $(@:.txt=.json)
+	$(FILESLIST_UTIL) -c $(@:.txt=.json) > $@
+
 INTERNAL_VENDOR_DEBUG_RAMDISK_TARGET := $(call intermediates-dir-for,PACKAGING,vendor_boot-debug)/vendor_ramdisk-debug.cpio$(RAMDISK_EXT)
-$(INTERNAL_VENDOR_DEBUG_RAMDISK_TARGET): DEBUG_RAMDISK_FILES := $(INTERNAL_DEBUG_RAMDISK_FILES)
-$(INTERNAL_VENDOR_DEBUG_RAMDISK_TARGET): VENDOR_RAMDISK_DIR := $(TARGET_VENDOR_RAMDISK_OUT)
 
 # Exclude recovery files in the default vendor ramdisk if including a standalone
 # recovery ramdisk in vendor_boot.
@@ -2473,23 +2478,12 @@
 endif
 endif
 
-INTERNAL_VENDOR_DEBUG_RAMDISK_FILES := $(filter $(TARGET_VENDOR_DEBUG_RAMDISK_OUT)/%, \
-    $(ALL_GENERATED_SOURCES) \
-    $(ALL_DEFAULT_INSTALLED_MODULES))
-
-# Note: TARGET_VENDOR_DEBUG_RAMDISK_OUT will be $(PRODUCT_OUT)/vendor_debug_ramdisk/first_stage_ramdisk,
-# if BOARD_USES_RECOVERY_AS_BOOT is true. Otherwise, it will be $(PRODUCT_OUT)/vendor_debug_ramdisk.
-# But the path of $(VENDOR_DEBUG_RAMDISK_DIR) to build the vendor debug ramdisk, is always
-# $(PRODUCT_OUT)/vendor_debug_ramdisk.
-$(INTERNAL_VENDOR_DEBUG_RAMDISK_TARGET): DEBUG_RAMDISK_DIR := $(PRODUCT_OUT)/debug_ramdisk
-$(INTERNAL_VENDOR_DEBUG_RAMDISK_TARGET): VENDOR_DEBUG_RAMDISK_DIR := $(PRODUCT_OUT)/vendor_debug_ramdisk
+# The vendor debug ramdisk combines vendor ramdisk and debug ramdisk.
 $(INTERNAL_VENDOR_DEBUG_RAMDISK_TARGET): $(INTERNAL_VENDOR_RAMDISK_TARGET) $(INSTALLED_DEBUG_RAMDISK_TARGET)
+$(INTERNAL_VENDOR_DEBUG_RAMDISK_TARGET): $(INSTALLED_FILES_FILE_VENDOR_DEBUG_RAMDISK)
 $(INTERNAL_VENDOR_DEBUG_RAMDISK_TARGET): $(MKBOOTFS) $(INTERNAL_VENDOR_DEBUG_RAMDISK_FILES) | $(COMPRESSION_COMMAND_DEPS)
 	mkdir -p $(TARGET_VENDOR_DEBUG_RAMDISK_OUT)
-	touch $(TARGET_VENDOR_DEBUG_RAMDISK_OUT)/force_debuggable
-	$(foreach debug_file,$(DEBUG_RAMDISK_FILES), \
-	  cp -f $(debug_file) $(patsubst $(DEBUG_RAMDISK_DIR)/%,$(VENDOR_DEBUG_RAMDISK_DIR)/%,$(debug_file)) &&) true
-	$(MKBOOTFS) -d $(TARGET_OUT) $(VENDOR_RAMDISK_DIR) $(VENDOR_DEBUG_RAMDISK_DIR) $(PRIVATE_ADDITIONAL_DIR) | $(COMPRESSION_COMMAND) > $@
+	$(MKBOOTFS) -d $(TARGET_OUT) $(TARGET_VENDOR_RAMDISK_OUT) $(TARGET_DEBUG_RAMDISK_OUT) $(TARGET_VENDOR_DEBUG_RAMDISK_OUT) $(PRIVATE_ADDITIONAL_DIR) | $(COMPRESSION_COMMAND) > $@
 
 ifeq (true,$(BOARD_BUILD_VENDOR_RAMDISK_IMAGE))
 INSTALLED_VENDOR_DEBUG_RAMDISK_TARGET := $(PRODUCT_OUT)/vendor_ramdisk-debug.img
@@ -2498,21 +2492,6 @@
 	$(copy-file-to-target)
 endif
 
-INSTALLED_FILES_FILE_VENDOR_DEBUG_RAMDISK := $(PRODUCT_OUT)/installed-files-vendor-ramdisk-debug.txt
-INSTALLED_FILES_JSON_VENDOR_DEBUG_RAMDISK := $(INSTALLED_FILES_FILE_VENDOR_DEBUG_RAMDISK:.txt=.json)
-$(INSTALLED_FILES_FILE_VENDOR_DEBUG_RAMDISK): .KATI_IMPLICIT_OUTPUTS := $(INSTALLED_FILES_JSON_VENDOR_DEBUG_RAMDISK)
-$(INSTALLED_FILES_FILE_VENDOR_DEBUG_RAMDISK): VENDOR_DEBUG_RAMDISK_DIR := $(PRODUCT_OUT)/vendor_debug_ramdisk
-
-# The vendor debug ramdisk will rsync from $(TARGET_VENDOR_RAMDISK_OUT) and $(INTERNAL_DEBUG_RAMDISK_FILES),
-# so we have to wait for the vendor debug ramdisk to be built before generating the installed file list.
-$(INSTALLED_FILES_FILE_VENDOR_DEBUG_RAMDISK): $(INTERNAL_VENDOR_DEBUG_RAMDISK_TARGET)
-$(INSTALLED_FILES_FILE_VENDOR_DEBUG_RAMDISK): $(INTERNAL_VENDOR_DEBUG_RAMDISK_FILES) $(FILESLIST) $(FILESLIST_UTIL)
-	@echo Installed file list: $@
-	mkdir -p $(dir $@)
-	rm -f $@
-	$(FILESLIST) $(VENDOR_DEBUG_RAMDISK_DIR) > $(@:.txt=.json)
-	$(FILESLIST_UTIL) -c $(@:.txt=.json) > $@
-
 # -----------------------------------------------------------------
 # vendor_boot-debug.img.
 INSTALLED_VENDOR_DEBUG_BOOTIMAGE_TARGET := $(PRODUCT_OUT)/vendor_boot-debug.img
@@ -2554,13 +2533,7 @@
 BUILT_TEST_HARNESS_RAMDISK_TARGET := $(PRODUCT_OUT)/ramdisk-test-harness.img
 INSTALLED_TEST_HARNESS_RAMDISK_TARGET := $(BUILT_TEST_HARNESS_RAMDISK_TARGET)
 
-# rsync the content from ramdisk-debug.img to ramdisk-test-harness.img, then
-# appends a few test harness specific properties into the adb_debug.prop.
-TEST_HARNESS_RAMDISK_SYNC_DIR := $(PRODUCT_OUT)/debug_ramdisk
-TEST_HARNESS_RAMDISK_ROOT_DIR := $(PRODUCT_OUT)/test_harness_ramdisk
-
-# The following TARGET_TEST_HARNESS_RAMDISK_OUT will be $(PRODUCT_OUT)/test_harness_ramdisk/first_stage_ramdisk,
-# if BOARD_USES_RECOVERY_AS_BOOT is true. Otherwise, it will be $(PRODUCT_OUT)/test_harness_ramdisk.
+# Appends a few test harness specific properties into the adb_debug.prop.
 TEST_HARNESS_PROP_TARGET := $(TARGET_TEST_HARNESS_RAMDISK_OUT)/adb_debug.prop
 ADDITIONAL_TEST_HARNESS_PROPERTIES := ro.audio.silent=1
 ADDITIONAL_TEST_HARNESS_PROPERTIES += ro.test_harness=1
@@ -2574,19 +2547,40 @@
   $(foreach line,$(1), echo "$(line)" >> $(2);)
 endef
 
+INTERNAL_TEST_HARNESS_RAMDISK_FILES := $(filter $(TARGET_TEST_HARNESS_RAMDISK_OUT)/%, \
+    $(ALL_GENERATED_SOURCES) \
+    $(ALL_DEFAULT_INSTALLED_MODULES))
+
+# ramdisk-test-harness.img will merge the content from either ramdisk.img or
+# ramdisk-recovery.img, depending on whether BOARD_USES_RECOVERY_AS_BOOT is set
+# or not.
+ifeq ($(BOARD_USES_RECOVERY_AS_BOOT),true)
+  $(INSTALLED_TEST_HARNESS_RAMDISK_TARGET): PRIVATE_ADDITIONAL_DIR := $(TARGET_RECOVERY_ROOT_OUT)
+  $(INSTALLED_TEST_HARNESS_RAMDISK_TARGET): $(recovery_ramdisk)
+else
+  $(INSTALLED_TEST_HARNESS_RAMDISK_TARGET): PRIVATE_ADDITIONAL_DIR := $(TARGET_RAMDISK_OUT)
+  $(INSTALLED_TEST_HARNESS_RAMDISK_TARGET): $(INSTALLED_RAMDISK_TARGET)
+endif # BOARD_USES_RECOVERY_AS_BOOT
+
+# The test harness ramdisk will rsync the files from the debug ramdisk, then appends some props.
 $(INSTALLED_TEST_HARNESS_RAMDISK_TARGET): $(INSTALLED_DEBUG_RAMDISK_TARGET)
 $(INSTALLED_TEST_HARNESS_RAMDISK_TARGET): $(MKBOOTFS) $(INTERNAL_TEST_HARNESS_RAMDISK_FILES) | $(COMPRESSION_COMMAND_DEPS)
 	$(call pretty,"Target test harness ramdisk: $@")
-	rsync --chmod=u+w -a $(TEST_HARNESS_RAMDISK_SYNC_DIR)/ $(TEST_HARNESS_RAMDISK_ROOT_DIR)
+	rsync --chmod=u+w -a $(TARGET_DEBUG_RAMDISK_OUT)/ $(TARGET_TEST_HARNESS_RAMDISK_OUT)
 	$(call append-test-harness-props,$(ADDITIONAL_TEST_HARNESS_PROPERTIES),$(TEST_HARNESS_PROP_TARGET))
-	$(MKBOOTFS) -d $(TARGET_OUT) $(TEST_HARNESS_RAMDISK_ROOT_DIR) | $(COMPRESSION_COMMAND) > $@
+	$(MKBOOTFS) -d $(TARGET_OUT) $(TARGET_TEST_HARNESS_RAMDISK_OUT) $(PRIVATE_ADDITIONAL_DIR) | $(COMPRESSION_COMMAND) > $@
 
 .PHONY: ramdisk_test_harness-nodeps
+ifeq ($(BOARD_USES_RECOVERY_AS_BOOT),true)
+  ramdisk_test_harness-nodeps: PRIVATE_ADDITIONAL_DIR := $(TARGET_RECOVERY_ROOT_OUT)
+else
+  ramdisk_test_harness-nodeps: PRIVATE_ADDITIONAL_DIR := $(TARGET_RAMDISK_OUT)
+endif # BOARD_USES_RECOVERY_AS_BOOT
 ramdisk_test_harness-nodeps: $(MKBOOTFS) | $(COMPRESSION_COMMAND_DEPS)
 	echo "make $@: ignoring dependencies"
-	rsync -a $(TEST_HARNESS_RAMDISK_SYNC_DIR)/ $(TEST_HARNESS_RAMDISK_ROOT_DIR)
+	rsync --chmod=u+w -a $(TARGET_DEBUG_RAMDISK_OUT)/ $(TARGET_TEST_HARNESS_RAMDISK_OUT)
 	$(call append-test-harness-props,$(ADDITIONAL_TEST_HARNESS_PROPERTIES),$(TEST_HARNESS_PROP_TARGET))
-	$(MKBOOTFS) -d $(TARGET_OUT) $(TEST_HARNESS_RAMDISK_ROOT_DIR) | $(COMPRESSION_COMMAND) > $(INSTALLED_TEST_HARNESS_RAMDISK_TARGET)
+	$(MKBOOTFS) -d $(TARGET_OUT) $(TARGET_TEST_HARNESS_RAMDISK_OUT) $(PRIVATE_ADDITIONAL_DIR) | $(COMPRESSION_COMMAND) > $(INSTALLED_TEST_HARNESS_RAMDISK_TARGET)
 
 endif # BUILDING_RAMDISK_IMAGE
 
@@ -5325,6 +5319,26 @@
 	$(hide) find $(PRODUCT_OUT)/appcompat | sort >$(PRIVATE_LIST_FILE)
 	$(hide) $(SOONG_ZIP) -d -o $@ -C $(PRODUCT_OUT)/appcompat -l $(PRIVATE_LIST_FILE)
 
+DEXPREOPT_CONFIG_ZIP := $(PRODUCT_OUT)/dexpreopt_config.zip
+$(DEXPREOPT_CONFIG_ZIP): $(FULL_SYSTEMIMAGE_DEPS) \
+	    $(INTERNAL_RAMDISK_FILES) \
+	    $(INTERNAL_USERDATAIMAGE_FILES) \
+	    $(INTERNAL_VENDORIMAGE_FILES) \
+	    $(INTERNAL_PRODUCTIMAGE_FILES) \
+	    $(INTERNAL_SYSTEM_EXTIMAGE_FILES) \
+	    $(DEX_PREOPT_CONFIG_FOR_MAKE) \
+	    $(DEX_PREOPT_SOONG_CONFIG_FOR_MAKE)
+
+$(DEXPREOPT_CONFIG_ZIP): $(SOONG_ZIP)
+	$(hide) mkdir -p $(dir $@) $(PRODUCT_OUT)/dexpreopt_config
+ifneq (,$(DEX_PREOPT_CONFIG_FOR_MAKE))
+	$(hide) cp $(DEX_PREOPT_CONFIG_FOR_MAKE) $(PRODUCT_OUT)/dexpreopt_config
+endif
+ifneq (,$(DEX_PREOPT_SOONG_CONFIG_FOR_MAKE))
+	$(hide) cp $(DEX_PREOPT_SOONG_CONFIG_FOR_MAKE) $(PRODUCT_OUT)/dexpreopt_config
+endif
+	$(hide) $(SOONG_ZIP) -d -o $@ -C $(PRODUCT_OUT)/dexpreopt_config -D $(PRODUCT_OUT)/dexpreopt_config
+
 # -----------------------------------------------------------------
 # A zip of the symbols directory.  Keep the full paths to make it
 # more obvious where these files came from.
diff --git a/core/base_rules.mk b/core/base_rules.mk
index a42d702..5f654a6 100644
--- a/core/base_rules.mk
+++ b/core/base_rules.mk
@@ -573,9 +573,14 @@
 my_vintf_pairs:=
 ifneq (true,$(LOCAL_UNINSTALLABLE_MODULE))
 ifndef LOCAL_IS_HOST_MODULE
-ifneq ($(strip $(LOCAL_VINTF_FRAGMENTS)),)
+ifneq ($(strip $(LOCAL_FULL_VINTF_FRAGMENTS)),)
+my_vintf_fragments := $(LOCAL_FULL_VINTF_FRAGMENTS)
+else
+my_vintf_fragments := $(foreach xml,$(LOCAL_VINTF_FRAGMENTS),$(LOCAL_PATH)/$(xml))
+endif
+ifneq ($(strip $(my_vintf_fragments)),)
 
-my_vintf_pairs := $(foreach xml,$(LOCAL_VINTF_FRAGMENTS),$(LOCAL_PATH)/$(xml):$(TARGET_OUT$(partition_tag)_ETC)/vintf/manifest/$(notdir $(xml)))
+my_vintf_pairs := $(foreach xml,$(my_vintf_fragments),$(xml):$(TARGET_OUT$(partition_tag)_ETC)/vintf/manifest/$(notdir $(xml)))
 my_vintf_installed := $(foreach xml,$(my_vintf_pairs),$(call word-colon,2,$(xml)))
 
 # Only set up copy rules once, even if another arch variant shares it
diff --git a/core/board_config.mk b/core/board_config.mk
index be37292..9061342 100644
--- a/core/board_config.mk
+++ b/core/board_config.mk
@@ -331,16 +331,6 @@
 endif
 
 ###########################################
-# Now we can substitute with the real value of TARGET_COPY_OUT_DEBUG_RAMDISK
-ifneq (,$(filter true,$(BOARD_USES_RECOVERY_AS_BOOT) \
-  $(BOARD_GKI_NONAB_COMPAT) $(BOARD_MOVE_RECOVERY_RESOURCES_TO_VENDOR_BOOT) \
-  $(BOARD_USES_GENERIC_KERNEL_IMAGE)))
-TARGET_COPY_OUT_DEBUG_RAMDISK := debug_ramdisk/first_stage_ramdisk
-TARGET_COPY_OUT_VENDOR_DEBUG_RAMDISK := vendor_debug_ramdisk/first_stage_ramdisk
-TARGET_COPY_OUT_TEST_HARNESS_RAMDISK := test_harness_ramdisk/first_stage_ramdisk
-endif
-
-###########################################
 # Configure whether we're building the system image
 BUILDING_SYSTEM_IMAGE := true
 ifeq ($(PRODUCT_BUILD_SYSTEM_IMAGE),)
diff --git a/core/clear_vars.mk b/core/clear_vars.mk
index faca97a..e2acb67 100644
--- a/core/clear_vars.mk
+++ b/core/clear_vars.mk
@@ -109,6 +109,7 @@
 LOCAL_FULL_LIBS_MANIFEST_FILES:=
 LOCAL_FULL_MANIFEST_FILE:=
 LOCAL_FULL_TEST_CONFIG:=
+LOCAL_FULL_VINTF_FRAGMENTS:=
 LOCAL_FUZZ_ENGINE:=
 LOCAL_FUZZ_INSTALLED_SHARED_DEPS:=
 LOCAL_GCNO_FILES:=
diff --git a/core/dex_preopt_odex_install.mk b/core/dex_preopt_odex_install.mk
index c6cc60d..a23bae2 100644
--- a/core/dex_preopt_odex_install.mk
+++ b/core/dex_preopt_odex_install.mk
@@ -399,6 +399,7 @@
   $(call json_end)
 
   my_dexpreopt_config := $(intermediates)/dexpreopt.config
+  my_dexpreopt_config_for_postprocessing := $(PRODUCT_OUT)/dexpreopt_config/$(LOCAL_MODULE)_dexpreopt.config
   my_dexpreopt_script := $(intermediates)/dexpreopt.sh
   my_dexpreopt_zip := $(intermediates)/dexpreopt.zip
   my_dexpreopt_config_merger := $(BUILD_SYSTEM)/dex_preopt_config_merger.py
@@ -428,6 +429,8 @@
 	-dexpreopt_script $@ \
 	-out_dir $(OUT_DIR)
 
+  $(eval $(call copy-one-file,$(my_dexpreopt_config),$(my_dexpreopt_config_for_postprocessing)))
+
   my_dexpreopt_deps := $(my_dex_jar)
   my_dexpreopt_deps += $(if $(my_process_profile),$(LOCAL_DEX_PREOPT_PROFILE))
   my_dexpreopt_deps += \
@@ -463,10 +466,12 @@
 
   $(LOCAL_INSTALLED_MODULE): PRIVATE_POST_INSTALL_CMD := $(LOCAL_POST_INSTALL_CMD)
   $(LOCAL_INSTALLED_MODULE): $(my_dexpreopt_zip)
+  $(LOCAL_INSTALLED_MODULE): $(my_dexpreopt_config_for_postprocessing)
 
   $(my_all_targets): $(my_dexpreopt_zip)
 
   my_dexpreopt_config :=
   my_dexpreopt_script :=
   my_dexpreopt_zip :=
+  my_dexpreopt_config_for_postprocessing :=
 endif # LOCAL_DEX_PREOPT
diff --git a/core/main.mk b/core/main.mk
index 05203bb..c9fa148 100644
--- a/core/main.mk
+++ b/core/main.mk
@@ -1708,6 +1708,7 @@
     $(PROGUARD_USAGE_ZIP) \
     $(COVERAGE_ZIP) \
     $(APPCOMPAT_ZIP) \
+    $(DEXPREOPT_CONFIG_ZIP) \
     $(INSTALLED_FILES_FILE) \
     $(INSTALLED_FILES_JSON) \
     $(INSTALLED_FILES_FILE_VENDOR) \
diff --git a/core/product_config.mk b/core/product_config.mk
index d703ee3..eb6f69f 100644
--- a/core/product_config.mk
+++ b/core/product_config.mk
@@ -359,6 +359,14 @@
   endif
 endif
 
+ifeq ($(PRODUCT_SET_DEBUGFS_RESTRICTIONS),)
+  ifdef PRODUCT_SHIPPING_API_LEVEL
+    ifeq (true,$(call math_gt_or_eq,$(PRODUCT_SHIPPING_API_LEVEL),31))
+      PRODUCT_SET_DEBUGFS_RESTRICTIONS := true
+    endif
+  endif
+endif
+
 ifdef PRODUCT_SHIPPING_API_LEVEL
   ifneq (,$(call math_gt_or_eq,29,$(PRODUCT_SHIPPING_API_LEVEL)))
     PRODUCT_PACKAGES += $(PRODUCT_PACKAGES_SHIPPING_API_LEVEL_29)
diff --git a/core/soong_app_prebuilt.mk b/core/soong_app_prebuilt.mk
index ce7b142..b7c21b8 100644
--- a/core/soong_app_prebuilt.mk
+++ b/core/soong_app_prebuilt.mk
@@ -13,6 +13,7 @@
 # LOCAL_SOONG_JNI_LIBS_$(TARGET_ARCH)
 # LOCAL_SOONG_JNI_LIBS_$(TARGET_2ND_ARCH)
 # LOCAL_SOONG_JNI_LIBS_SYMBOLS
+# LOCAL_SOONG_DEXPREOPT_CONFIG
 
 ifneq ($(LOCAL_MODULE_MAKEFILE),$(SOONG_ANDROID_MK))
   $(call pretty-error,soong_app_prebuilt.mk may only be used from Soong)
@@ -49,6 +50,14 @@
   .PHONY: javac-check-$(LOCAL_MODULE)
 endif
 
+ifdef LOCAL_SOONG_DEXPREOPT_CONFIG
+  my_dexpreopt_config := $(PRODUCT_OUT)/dexpreopt_config/$(LOCAL_MODULE)_dexpreopt.config
+  $(eval $(call copy-one-file,$(LOCAL_SOONG_DEXPREOPT_CONFIG), $(my_dexpreopt_config)))
+  $(LOCAL_BUILT_MODULE): $(my_dexpreopt_config)
+endif
+
+
+
 # Run veridex on product, system_ext and vendor modules.
 # We skip it for unbundled app builds where we cannot build veridex.
 module_run_appcompat :=
diff --git a/core/soong_java_prebuilt.mk b/core/soong_java_prebuilt.mk
index 0922def..1ebbf14 100644
--- a/core/soong_java_prebuilt.mk
+++ b/core/soong_java_prebuilt.mk
@@ -161,6 +161,9 @@
 # modules can find them.
 ifdef LOCAL_SOONG_DEXPREOPT_CONFIG
   $(eval $(call copy-one-file,$(LOCAL_SOONG_DEXPREOPT_CONFIG), $(call local-intermediates-dir,)/dexpreopt.config))
+  my_dexpreopt_config := $(PRODUCT_OUT)/dexpreopt_config/$(LOCAL_MODULE)_dexpreopt.config
+  $(eval $(call copy-one-file,$(LOCAL_SOONG_DEXPREOPT_CONFIG), $(my_dexpreopt_config)))
+  $(LOCAL_BUILT_MODULE): $(my_dexpreopt_config)
 endif
 
 ifdef LOCAL_SOONG_CLASSES_JAR
diff --git a/envsetup.sh b/envsetup.sh
index a2f7227..b5c729d 100644
--- a/envsetup.sh
+++ b/envsetup.sh
@@ -608,7 +608,7 @@
 {
     local uname=$(uname)
     local choices
-    choices=$(TARGET_BUILD_APPS= get_build_var COMMON_LUNCH_CHOICES 2>/dev/null)
+    choices=$(TARGET_BUILD_APPS= TARGET_PRODUCT= TARGET_BUILD_VARIANT= get_build_var COMMON_LUNCH_CHOICES 2>/dev/null)
     local ret=$?
 
     echo
diff --git a/target/board/BoardConfigModuleCommon.mk b/target/board/BoardConfigModuleCommon.mk
index 24c01a5..9832474 100644
--- a/target/board/BoardConfigModuleCommon.mk
+++ b/target/board/BoardConfigModuleCommon.mk
@@ -4,3 +4,7 @@
 
 # Required for all module devices.
 TARGET_USES_64_BIT_BINDER := true
+
+# Necessary to make modules able to use the VNDK via 'use_vendor: true'
+# TODO(b/185769808): look into whether this is still used.
+BOARD_VNDK_VERSION := current
diff --git a/target/product/updatable_apex.mk b/target/product/updatable_apex.mk
index d606e00..c8dc8b0 100644
--- a/target/product/updatable_apex.mk
+++ b/target/product/updatable_apex.mk
@@ -22,9 +22,4 @@
   PRODUCT_PACKAGES += com.android.apex.cts.shim.v1_prebuilt
   PRODUCT_VENDOR_PROPERTIES := ro.apex.updatable=true
   TARGET_FLATTEN_APEX := false
-  # Use compressed apexes in pre-installed partitions.
-  # Note: this doesn't mean that all pre-installed apexes will be compressed.
-  #  Whether an apex is compressed or not is controlled at apex Soong module
-  #  via compresible property.
-  PRODUCT_COMPRESSED_APEX := true
 endif
diff --git a/tools/releasetools/build_super_image.py b/tools/releasetools/build_super_image.py
index fb31415..ac61e60 100755
--- a/tools/releasetools/build_super_image.py
+++ b/tools/releasetools/build_super_image.py
@@ -194,10 +194,8 @@
       return BuildSuperImageFromTargetFiles(inp, out)
 
     if os.path.isfile(inp):
-      with open(inp) as f:
-        lines = f.read()
       logger.info("Building super image from info dict...")
-      return BuildSuperImageFromDict(common.LoadDictionaryFromLines(lines.split("\n")), out)
+      return BuildSuperImageFromDict(common.LoadDictionaryFromFile(inp), out)
 
   raise ValueError("{} is not a dictionary or a valid path".format(inp))
 
diff --git a/tools/releasetools/img_from_target_files.py b/tools/releasetools/img_from_target_files.py
index 5409194..cbb51e1 100755
--- a/tools/releasetools/img_from_target_files.py
+++ b/tools/releasetools/img_from_target_files.py
@@ -187,6 +187,9 @@
   Raises:
     ValueError: On invalid input.
   """
+  if not os.path.exists(input_file):
+    raise ValueError('%s is not exist' % input_file)
+
   if not zipfile.is_zipfile(input_file):
     raise ValueError('%s is not a valid zipfile' % input_file)
 
diff --git a/tools/releasetools/sign_target_files_apks.py b/tools/releasetools/sign_target_files_apks.py
index 22c6ac4..313d1e6 100755
--- a/tools/releasetools/sign_target_files_apks.py
+++ b/tools/releasetools/sign_target_files_apks.py
@@ -799,7 +799,7 @@
         value = "/".join(pieces)
       elif key == "ro.build.description":
         pieces = value.split(" ")
-        assert len(pieces) == 5
+        assert pieces[-1].endswith("-keys")
         pieces[-1] = EditTags(pieces[-1])
         value = " ".join(pieces)
       elif key.startswith("ro.") and key.endswith(".build.tags"):
diff --git a/tools/warn.py b/tools/warn.py
index 22ac872..5f796f5 100755
--- a/tools/warn.py
+++ b/tools/warn.py
@@ -1,4 +1,4 @@
-#!/usr/bin/python
+#!/usr/bin/env python3
 #
 # Copyright (C) 2019 The Android Open Source Project
 #
@@ -28,7 +28,7 @@
 
 def main():
   os.environ['PYTHONPATH'] = os.path.dirname(os.path.abspath(__file__))
-  subprocess.check_call(['/usr/bin/python', '-m', 'warn.warn'] + sys.argv[1:])
+  subprocess.check_call(['/usr/bin/python3', '-m', 'warn.warn'] + sys.argv[1:])
 
 
 if __name__ == '__main__':
diff --git a/tools/warn/html_writer.py b/tools/warn/html_writer.py
index 026a6d0..be71b55 100644
--- a/tools/warn/html_writer.py
+++ b/tools/warn/html_writer.py
@@ -52,8 +52,8 @@
 #   emit_js_data():
 
 from __future__ import print_function
-import cgi
 import csv
+import html
 import sys
 
 # pylint:disable=relative-beyond-top-level
@@ -582,10 +582,7 @@
 def emit_const_html_string_array(name, array, writer):
   writer('const ' + name + ' = [')
   for s in array:
-    # Not using html.escape yet, to work for both python 2 and 3,
-    # until all users switch to python 3.
-    # pylint:disable=deprecated-method
-    writer('"' + cgi.escape(strip_escape_string(s)) + '",')
+    writer('"' + html.escape(strip_escape_string(s)) + '",')
   writer('];')
 
 
diff --git a/tools/warn/warn.py b/tools/warn/warn.py
index 56e8787..cb5daec 100755
--- a/tools/warn/warn.py
+++ b/tools/warn/warn.py
@@ -1,4 +1,4 @@
-#!/usr/bin/python
+#!/usr/bin/env python3
 #
 # Copyright (C) 2019 The Android Open Source Project
 #